The Pixel Bender toolkit nicely lets us input values for
parameters in our kernels. Unfortunately, the range of values it
lets you input is frustrating... For floats, it forces all of the
components to be in the range of [0,1] and for ints it foces the
range of [0, 100]. This is frustrating when I want to have a vector
parameter as <-20, -20, -20>!
Please let us input our own values outside of the current